Which of the following could be said about ecological footprints?

a. ecological footprints don't take into account resources needed to absorb and manage wastes.
b. exact ecological footprints are often difficult to calculate, but estimates can be useful in comparing populations.
c. the average ecological footprints for various countries are nearly identical.
d. ecological footprints can't be used to determine carrying capacity.

Exact ecological footprints are often difficult to calculate, but estimates can be useful in comparing populations

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a